Bump pmdVersion from 6.54.0 to 6.55.0 (#115)

Bumps `pmdVersion` from 6.54.0 to 6.55.0.

Updates `pmd-core` from 6.54.0 to 6.55.0
- [Release notes](https://github.com/pmd/pmd/releases)
- [Changelog](https://github.com/pmd/pmd/blob/master/docs/render_release_notes.rb)
- [Commits](https://github.com/pmd/pmd/compare/pmd_releases/6.54.0...pmd_releases/6.55.0)

Updates `pmd-java` from 6.54.0 to 6.55.0
- [Release notes](https://github.com/pmd/pmd/releases)
- [Changelog](https://github.com/pmd/pmd/blob/master/docs/render_release_notes.rb)
- [Commits](https://github.com/pmd/pmd/compare/pmd_releases/6.54.0...pmd_releases/6.55.0)

Updates `pmd-javascript` from 6.54.0 to 6.55.0
- [Release notes](https://github.com/pmd/pmd/releases)
- [Changelog](https://github.com/pmd/pmd/blob/master/docs/render_release_notes.rb)
- [Commits](https://github.com/pmd/pmd/compare/pmd_releases/6.54.0...pmd_releases/6.55.0)

Updates `pmd-jsp` from 6.54.0 to 6.55.0
- [Release notes](https://github.com/pmd/pmd/releases)
- [Changelog](https://github.com/pmd/pmd/blob/master/docs/render_release_notes.rb)
- [Commits](https://github.com/pmd/pmd/compare/pmd_releases/6.54.0...pmd_releases/6.55.0)

---
updated-dependencies:
- dependency-name: net.sourceforge.pmd:pmd-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: net.sourceforge.pmd:pmd-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: net.sourceforge.pmd:pmd-javascript
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: net.sourceforge.pmd:pmd-jsp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/pom.xml b/pom.xml
index c17a29f..7b66ff6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -89,7 +89,7 @@
     <doxiaVersion>1.11.1</doxiaVersion>
     <doxiaSitetoolsVersion>1.11.1</doxiaSitetoolsVersion>
     <javaVersion>8</javaVersion><!-- Because PMD 6.35.0+ requires Java 8 -->
-    <pmdVersion>6.54.0</pmdVersion>
+    <pmdVersion>6.55.0</pmdVersion>
     <slf4jVersion>1.7.36</slf4jVersion>
     <aetherVersion>1.0.0.v20140518</aetherVersion>
     <sitePluginVersion>3.12.1</sitePluginVersion>